"He saw my keys on the table, right close by, so he grabbed the keys and said, 'Come on. I'll show you,'" Stewart said. "He started to open the car, and I said, 'What are you doing?'"

Stewart said the man showed a gun and said, "Don't give me any trouble."

Hall then fled to Billerica, police said, where a second carjacking was reported on Nashua Road.

The owner of a Billerica liquor store said a man came in to buy cigarettes.

"He spent a great deal of time pretty much trying to come up with the right change," the owner of the liquor store said.

Moments later, a customer said the man stole his truck, leaving a car stolen from Newton behind.

Hall then led police to Carlisle, where shots were fired by police. He then crashed the second stolen vehicle, a Toyota Tundra, in Concord and carjacked a Ford Flex at gunpoint on Lowell Road, police said.

"There were numerous cruisers on the side of the road. The gentleman just crashed the car, and we heard someone say he hijacked the car," witness Jason Drinkwater said. "It's crazy. In Concord, it's crazy."

Hall then fled to Hanscom Air Force Base, where the drove the car through the guard gate, police said.

As the car crossed the Bedford line, police officers deployed spike strips, which the car ran over, puncturing the tires.

"A short time later, pursuing police cruisers performed a specialized maneuver, which caused the suspect to lose control of the vehicle. The suspect struck a utility pole and then a tree," police said in a statement.

At some point in the pursuit, Hall suffered a gunshot wound and was taken to a local hospital with injuries that police said are not life-threatening.

Hall faces arraignment on what police called "multiple charges" Tuesday.

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